In my experience, 1 ounce of priming sugar is very likely to be way too much and result in very high carbonation or gushers. But it depends...
Volume measurement will be critical, and be sure to exclude the inch of trub at the bottom. Do you really have 1.00 gallons, or do you actually have 0.9 or 0.8 gallons? In any case, you'll be lucky to get 10 bottles out of it. Probably can expect roughly 6-8 bottles, depending on exact volume of liquid beer to be bottled.
From the volume to be bottled, whatever that is, I recommend 2 tablespoons sugar per 1.00 gallons. So if you really have 0.8 gallons to be bottled, for instance, then use 1.6 tablespoons sugar.
Hope this helps. I've been bottling every batch (currently on about #150) for the past 20 years, and have been a small batch brewer for about the last 10 years. Cheers and good luck.